1 /* $OpenBSD: sftp-common.c,v 1.23 2010/01/15 09:24:23 markus Exp $ */
2 /*
3 * Copyright (c) 2001 Markus Friedl. All rights reserved.
4 * Copyright (c) 2001 Damien Miller. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "includes.h"
28
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <sys/param.h>
32
33 #include <grp.h>
34 #include <pwd.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <time.h>
38 #include <stdarg.h>
39 #ifdef HAVE_UTIL_H
40 #include <util.h>
41 #endif
42
43 #include "xmalloc.h"
44 #include "buffer.h"
45 #include "log.h"
46
47 #include "sftp.h"
48 #include "sftp-common.h"
49
50 /* Clear contents of attributes structure */
51 void
attrib_clear(Attrib * a)52 attrib_clear(Attrib *a)
53 {
54 a->flags = 0;
55 a->size = 0;
56 a->uid = 0;
57 a->gid = 0;
58 a->perm = 0;
59 a->atime = 0;
60 a->mtime = 0;
61 }
62
63 /* Convert from struct stat to filexfer attribs */
64 void
stat_to_attrib(const struct stat * st,Attrib * a)65 stat_to_attrib(const struct stat *st, Attrib *a)
66 {
67 attrib_clear(a);
68 a->flags = 0;
69 a->flags |= SSH2_FILEXFER_ATTR_SIZE;
70 a->size = st->st_size;
71 a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
72 a->uid = st->st_uid;
73 a->gid = st->st_gid;
74 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
75 a->perm = st->st_mode;
76 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
77 a->atime = st->st_atime;
78 a->mtime = st->st_mtime;
79 }
80
81 /* Convert from filexfer attribs to struct stat */
82 void
attrib_to_stat(const Attrib * a,struct stat * st)83 attrib_to_stat(const Attrib *a, struct stat *st)
84 {
85 memset(st, 0, sizeof(*st));
86
87 if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
88 st->st_size = a->size;
89 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
90 st->st_uid = a->uid;
91 st->st_gid = a->gid;
92 }
93 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
94 st->st_mode = a->perm;
95 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
96 st->st_atime = a->atime;
97 st->st_mtime = a->mtime;
98 }
99 }
100
101 /* Decode attributes in buffer */
102 Attrib *
decode_attrib(Buffer * b)103 decode_attrib(Buffer *b)
104 {
105 static Attrib a;
106
107 attrib_clear(&a);
108 a.flags = buffer_get_int(b);
109 if (a.flags & SSH2_FILEXFER_ATTR_SIZE)
110 a.size = buffer_get_int64(b);
111 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
112 a.uid = buffer_get_int(b);
113 a.gid = buffer_get_int(b);
114 }
115 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
116 a.perm = buffer_get_int(b);
117 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
118 a.atime = buffer_get_int(b);
119 a.mtime = buffer_get_int(b);
120 }
121 /* vendor-specific extensions */
122 if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
123 char *type, *data;
124 int i, count;
125
126 count = buffer_get_int(b);
127 for (i = 0; i < count; i++) {
128 type = buffer_get_string(b, NULL);
129 data = buffer_get_string(b, NULL);
130 debug3("Got file attribute \"%s\"", type);
131 xfree(type);
132 xfree(data);
133 }
134 }
135 return &a;
136 }
137
138 /* Encode attributes to buffer */
139 void
encode_attrib(Buffer * b,const Attrib * a)140 encode_attrib(Buffer *b, const Attrib *a)
141 {
142 buffer_put_int(b, a->flags);
143 if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
144 buffer_put_int64(b, a->size);
145 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
146 buffer_put_int(b, a->uid);
147 buffer_put_int(b, a->gid);
148 }
149 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
150 buffer_put_int(b, a->perm);
151 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
152 buffer_put_int(b, a->atime);
153 buffer_put_int(b, a->mtime);
154 }
155 }
156
157 /* Convert from SSH2_FX_ status to text error message */
158 const char *
fx2txt(int status)159 fx2txt(int status)
160 {
161 switch (status) {
162 case SSH2_FX_OK:
163 return("No error");
164 case SSH2_FX_EOF:
165 return("End of file");
166 case SSH2_FX_NO_SUCH_FILE:
167 return("No such file or directory");
168 case SSH2_FX_PERMISSION_DENIED:
169 return("Permission denied");
170 case SSH2_FX_FAILURE:
171 return("Failure");
172 case SSH2_FX_BAD_MESSAGE:
173 return("Bad message");
174 case SSH2_FX_NO_CONNECTION:
175 return("No connection");
176 case SSH2_FX_CONNECTION_LOST:
177 return("Connection lost");
178 case SSH2_FX_OP_UNSUPPORTED:
179 return("Operation unsupported");
180 default:
181 return("Unknown status");
182 }
183 /* NOTREACHED */
184 }
185
186 /*
187 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
188 */
189 char *
ls_file(const char * name,const struct stat * st,int remote,int si_units)190 ls_file(const char *name, const struct stat *st, int remote, int si_units)
191 {
192 int ulen, glen, sz = 0;
193 struct tm *ltime = localtime(&st->st_mtime);
194 char *user, *group;
195 char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
196 char sbuf[FMT_SCALED_STRSIZE];
197
198 strmode(st->st_mode, mode);
199 if (!remote) {
200 user = user_from_uid(st->st_uid, 0);
201 } else {
202 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
203 user = ubuf;
204 }
205 if (!remote) {
206 group = group_from_gid(st->st_gid, 0);
207 } else {
208 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
209 group = gbuf;
210 }
211 if (ltime != NULL) {
212 if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
213 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
214 else
215 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
216 }
217 if (sz == 0)
218 tbuf[0] = '\0';
219 ulen = MAX(strlen(user), 8);
220 glen = MAX(strlen(group), 8);
221 if (si_units) {
222 fmt_scaled((long long)st->st_size, sbuf);
223 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode,
224 (u_int)st->st_nlink, ulen, user, glen, group,
225 sbuf, tbuf, name);
226 } else {
227 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
228 (u_int)st->st_nlink, ulen, user, glen, group,
229 (unsigned long long)st->st_size, tbuf, name);
230 }
231 return xstrdup(buf);
232 }
233